Cornice brake



Sept. 2 1924.

J. F. KIDDER CORNICE BRAKE Filed Anril 19. 1921 Patented Sept? 2, 1924. I

UNITED STATES PATENT OFFICE.

COfRNIGE BRAKE.

Application filed. April 19, 1921. Serial'No. 462,691.

To all whom it may concern; 7

Be it known that I, JOHITF; IxloDER, a citizen of the United States, residing at Burlington, in the county of Chittenden and State of Vermont, have invented certain new and useful Improvements in Cornlce Brakes, of which the following is a speci-.

fication, reference being had therein to the accompanying drawing.

. This invention relates to certain new and useful improvements in cornice brakes for bending sheet metal and the like, the object being to provide novel means of mounting and operating the movable jaw of the brake so that the same can be adjusted to a nicety in order to enable the same to be set for working on different thicknesses of metal. 1 Another and further object of the invention is to provide a novel form of double eccentric mounted within the connecting link, one of the eccentrics being adjustably mounted within the link so as to set the movable jaw in the desired position in respect to the fixed jaw.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claim.

In the drawings,

Figure l is a side elevation of the upper portion of an ordinary form of cornice brake showing the application of my improved construction of double eccentric; and

Fig. 2 is a section taken on line 22 of Fig. 1.

In the drawings 1 indicates a bed forming the fixed jaw of the cornice brake which has adjustably mounted thereon a bracket 2 in which is loosely mounted a movable jaw 3. Pivotally mounted on the bed 1 is a link 4: which is split as shown at 5 and is provided with apertured ears 6 and 7, the apertured ear 7 being threaded to receive a bolt 8 clamping the ears together for the purpose hereinafter fully described.

The link 1 is provided with a circular opening 9, the wall of which is grooved, the groove being struck on the arc of a circle to form a concave face 10 in which is -arcourse, being understood that the bolt 8 is.

first loosened. Mounted within the eccentric 11 is an eccentric 14, said eccentric Working over a stud 15 carried by the movable jaw 3 and provided with a handle 16 for operating the same so as to move the movable jaw of the brake towards and away from the fixed jaw.

The operation of the invention when applied to a cornice brake as herein shown is as follows :Assuming that it is desired to work on material of. a certain thickness, the bolt 8 is loosened and a spanner wrench placed in the openings of the eccentric 11 and the eccentric is adjusted within the link a so as to set the movable jaw a predetermined distance away from the fixed jaw of the brake, the bolt'8 being then tightened so v as to lock the jaw in its adjusted positionQ The material is then placed between'the jaws in the ordinary manner and byoperating the handle 16, the movable jaw is forced I intoengagement with the material so as to securely clamp the same between the jaws.

From the foregoing description it'will' be.

seen that I have provided a cornice brake with a double eccentric for adjusting and While I have shown certain details of con-' struction of a cornice brake, I do not wishto limit the use of my double eccentric to any particular construction of cornice brake as I am aware that the same can be used in connection with Various forms of metal bending machines and my invention consists broadly in providing a metal bending machinehaving a movable jaw operated by an eccentric mounted within an adjustably' mounted eccentric for allowing the movable jaw to be predeterminedly set so that it will be held the desired distance away from the fixed jaw which enables the machine to be adjusted to operate on various thicknesses of material so as to save time in tion of the machine.

What I claim is A cornice brake having a bed forming a V fixed jaw, an adjustable support carried by said jaw, a movable jaw mounted in said support, said movable jaw being provided with a laterally extending stud pin at one end, a link the opera- 7 pivotally connected to the fixed jaw below 7 said movable jaw andextending upwardly-opposite said morale 1 said link l gmyinggin openmg'proyided:With a conoaye \mllgfofrning an annular groove and provided with a split portion provided with laterally extending ears, a bolt connecting saideafs together, an adjustable eccentric arranged Within the opening of said link liavi ng a peripheral Wall corresponding in, shape to;

the wall of said opening said eccentric hava hagndle egrried loy tl e last mentioned eccentric for operating said movable jaw.

lg t e sgipmny whereof I here-unto aflix my 15 signature.

JOHN F. KIDDEn 

